The Composition of RR Lyrae Stars: Start-line for the AGB
George Wallerstein, Wenjin Huang
TL;DR
This study analyzes the chemical abundances in RR Lyrae stars, providing preliminary results on elements like C, Si, S, and Fe, using high-resolution spectra and NLTE modeling to understand their compositions.
Contribution
It presents new abundance measurements of key elements in RR Lyrae stars using advanced spectral analysis techniques.
Findings
Preliminary abundance data for C, Si, S, and Fe in 24 RR Lyrae stars.
Use of NLTE effects in model atmosphere analysis.
High-resolution spectra obtained at Apache Point Observatory.
Abstract
This paper sumarizes research on abundances in RR Lyrae stars that one of us (GW) has been engaged in with various astronomers. In addition we report on preliminary analysis of the abundances of C, Si, S and Fe in 24 RR Lyrae stars. Our model atmosphere analysis, including NLTE effects, are based on the spectra of resolving power 30,000 obtained at the Apache Poing Observatory.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astro and Planetary Science